Acoustic Louver, Acoustic Door, Acoustic Enclosure manufacturer / supplier in China, offering Sand Proof Aluminum Louvers: Protecting Ventilation Systems From Dust and Sand Infiltration, Enhance Hospital Quiet Zones with Black Metal Acoustic Louvered Doors: Ideal for Mechanical & Electrical Noise Control, Black Metal Acoustic Louvered Doors: Superior Noise Reduction for Hospital Mechanical & Electrical Areas and so on.